Connecticut homeowners are installing solar panels faster than ever — and squirrels have noticed. The shaded, sheltered space between rooftop panels and the roof deck is one of the most appealing nesting spots a gray squirrel can find: warm, dry, predator-free, and conveniently located next to your soffit vents and attic.

We've handled solar exclusion calls from Bristol to Waterbury this season, and the pattern is consistent. Homeowners notice debris on the deck, hear scratching overhead, or — like one recent caller — spot a litter of baby squirrels running across the yard from underneath the array. Here's what's at stake, how to spot the problem early, and how professional exclusion actually works.

1. Why Solar Panels Are a Magnet for Squirrels in Connecticut

From a squirrel's perspective, the cavity beneath a solar array is close to perfect. The panels block rain and snow, the gap between the panel and the roof traps heat, and the surrounding mounting hardware gives them easy purchase to climb in and out. Most residential solar installations don't include any kind of mesh barrier by default, so the entire perimeter of the array is essentially an open invitation.

Gray squirrels in Connecticut typically have two litters per year — one in late winter and one in mid-summer. May and June are when the spring litter starts running around the roofline, which is why this is the peak season for "I saw babies on my deck" calls.

The Damage You Don't See: Wiring, Warranties, and Roof Risk

The scratching and the mess are the obvious symptoms. The expensive part is what's happening above them:

• Chewed DC wiring. Squirrels gnaw constantly to wear down their incisors. The cables running between your panels and the inverter are right in their nesting zone, and chewed wire insulation can short circuits, kill production, or in rare cases start a fire.
• Voided panel warranties. Most major solar manufacturers require that arrays be protected with critter guard mesh. If a damage claim traces back to rodent activity and you don't have exclusion installed, your warranty likely won't cover it.
• Roof damage. Squirrels chew shingles, lift flashing, and widen any gap they can find. Once they're underneath the panels, they often expand into the attic through soffit vents or gable ends.
• Hidden infestation. Once squirrels are nesting on the roof, mice and other rodents often follow the same path inside. We frequently find that a "squirrel problem" has already become a mouse problem in the attic by the time we're called.

How Professional Exclusion Works

Exclusion is the standard solution and it has three stages:

1. Inspection. A technician walks the roof (or inspects with a ladder and binoculars when steep-pitch access isn't safe), identifies active nests, looks for entry points into the attic, and checks the existing array for any prior damage.
2. Humane removal. If active animals are present, we use one-way doors and live trapping where appropriate. Connecticut regulates how and when wildlife can be relocated, and during nursing season we work around it so pups aren't separated from the mother.
3. Critter guard installation. Galvanized mesh is clipped to the underside of the panels around the entire perimeter, sealing the cavity. This is what actually stops the problem from coming back. Done correctly, it's nearly invisible from the ground and doesn't void your solar warranty — in most cases it's a requirement for the warranty.

Signs to Watch for Around Your Roofline

Even if you haven't seen a squirrel yet, watch for:

• Nut shells, twigs, or insulation fragments on your deck or driveway directly below the panels
• Scratching or thumping sounds in the ceiling, especially around dawn
• A drop in your solar production data without a weather explanation
• Chew marks on roof edges, soffits, or fascia
• Squirrel tracks or "trails" worn into algae or moss on the roof

The earlier you catch it, the cheaper and faster the fix. A clean exclusion job on an undamaged array is straightforward; one that includes wiring repair, drywall replacement under chewed soffits, and full attic decontamination is a much bigger project.

2. What ProSource's Solar Exclusion Service Includes

Our team handles wildlife exclusion across the Waterbury, Southington, Bristol, Cheshire, Thomaston, and West Hartford service area. A typical solar exclusion job for us looks like this:

• Free wildlife inspection (no cost if you're inside our 15-mile service area)
• Written recommendation with a clear price quote — no phone estimates, because the right scope depends on the array size, roof access, and whether animals are still on site
• Humane removal and, when appropriate, one-way doors during the active phase
• Critter guard mesh installation around the full perimeter of the array
• Sealing of any secondary entry points into the attic or soffit

If you're not sure whether what you're hearing is squirrels, raccoons, or something else, our guide to handling wildlife encounters around your home is a good starting point.

3. When to Call

If you're seeing nesting debris on the deck below your panels, hearing daytime activity overhead, or noticing your production numbers drop without a weather explanation, schedule an inspection before the colony establishes inside the attic. We can usually have a technician at your home within 24 hours.

Contact ProSource Pest Solutions to schedule a free wildlife inspection, or call our Waterbury office. We'll walk the array, identify what's going on, and give you a clear written quote before any work begins.